Soluble solid hair coloring article

Abstract

A soluble solid hair coloring article having zwitterionic direct dye and one or more soluble porous solids containing nonionic surfactant, cationic surfactant, or a mixture thereof, such that the one or more soluble porous solids have a density of from about 0.03 g/cm3 to about 0.15 g/cm3; and methods of applying the soluble solid hair coloring article to hair.

What is claimed is: 
     
       1. A soluble solid hair coloring article comprising:
 (a) from about 0.4 to about 2.0 grams of direct dye, wherein said direct dye comprises zwitterionic direct dye; 
 (b) one or more soluble porous solids comprising:
 (i) from about 10% to about 50% polymeric structurant; 
 (ii) from about 1% to about 30% plasticizer; 
 (iii) from about 2% to about 75% surfactant, selected from the group consisting of: nonionic surfactant, cationic surfactant, anionic surfactant, a mixture of nonionic and cationic surfactant, and a mixture of nonionic and anionic surfactant; 
 
 wherein the density of the one or more soluble porous solids is from about 0.03 g/cm3 to about 0.15 g/cm3. 
 
     
     
       2. The soluble solid hair coloring article of  claim 1 , wherein said zwitterionic direct dye is a solid that is encompassed by said one or more soluble porous solids. 
     
     
       3. The soluble solid hair coloring article of  claim 1 , wherein said one or more soluble porous solids comprises a mixture of zwitterionic direct dye; polymeric structurant; plasticizer; and nonionic surfactant, cationic surfactant, or mixture thereof. 
     
     
       4. The soluble solid hair coloring article of  claim 1 , further comprising a source of carbonate ions, carbamate ions, hydrogencarbonate ions, peroxymonocarbonate ions, or any mixture thereof. 
     
     
       5. The soluble solid hair coloring article of  claim 4  wherein the source of carbonate ions is ammonium carbonate. 
     
     
       6. The soluble solid hair coloring article of  claim 4 , wherein said one or more soluble porous solids comprises carbonate ions, carbamate ions, hydrogencarbonate ions, peroxymonocarbonate ions, or any mixture thereof. 
     
     
       7. The soluble solid hair coloring article of  claim 6 , wherein said carbonate ions, carbamate ions, hydrogencarbonate ions, peroxymonocarbonate ions, or any mixture thereof are a solid. 
     
     
       8. The soluble solid hair coloring article of  claim 1 , further comprising at least one source of an oxidizing agent. 
     
     
       9. The soluble solid hair coloring article of  claim 8 , wherein said at least one source of an oxidizing agent is selected from the group consisting of percarbonate, perborate, or persulphate salts and mixtures thereof. 
     
     
       10. The soluble solid hair coloring article of  claim 1 , wherein said polymeric structurant is selected from the group consisting of polyvinyl alcohols, hydroxypropylmethylcelluloses, and mixtures thereof. 
     
     
       11. The soluble solid hair coloring article of  claim 1 , wherein said plasticizer is selected from the group consisting of glycerin, diglycerin, propylene glycol, ethylene glycol, butylene glycol, pentylene glycol, cyclohexane dimethanol, hexane diol, polyethylene glycol, sugar alcohols, mono-, di- and oligo-saccharides, ascorbic acid, and mixtures thereof. 
     
     
       12. The soluble solid hair coloring article of  claim 1 , wherein the nonionic surfactant is selected from the group consisting of sorbitan esters, alkoxylated derivatives of sorbitan esters, and mixtures thereof. 
     
     
       13. The soluble solid hair coloring article of  claim 1 , wherein the cationic surfactant is selected from the group consisting of trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, distearyl dimethyl ammonium chloride, and mixtures thereof. 
     
     
       14. A premix for forming a soluble solid hair coloring article comprising: from about 0.4 to about 2.0 grams of zwitterionic direct dye; a polymeric structurant; a plasticizer; a nonionic surfactant, a cationic surfactant or a mixture thereof; and from about 50% to about 75% by weight of the premix of water. 
     
     
       15. The premix of  claim 14 , wherein the polymeric structurant is selected from the group consisting of polyvinyl alcohols, hydroxypropylmethylcelluloses, and mixtures thereof. 
     
     
       16. The premix of  claim 14 , wherein the plasticizer is selected from the group consisting of glycerin, diglycerin, propylene glycol, ethylene glycol, butylene glycol, pentylene glycol, cyclohexane dimethanol, hexane diol, polyethylene glycol, sugar alcohols, mono-, di- and oligo-saccharides, ascorbic acid, and mixtures thereof. 
     
     
       17. The premix of  claim 14 , wherein the nonionic surfactant is selected from the group consisting of sorbitan esters, alkoxylated derivatives of sorbitan esters, and mixtures thereof. 
     
     
       18. The premix of  claim 14 , wherein the cationic surfactant is selected from the group consisting of trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, distearyl dimethyl ammonium chloride, and mixtures thereof. 
     
     
       19. A method of coloring hair comprising the steps of:
 (a) exposing a soluble solid hair coloring article comprising zwitterionic direct dye and one or more soluble porous solids to a solvent such that the soluble solid hair coloring article dissolves to form a hair coloring solution; wherein the density of the one or more soluble porous solids is from about 0.03 g/cm 3  to about 0.15 g/cm 3 ; and further wherein the ratio of cationic direct dye to hair is from 2:1 to 5:1 and; 
 (b) applying the hair coloring solution to hair. 
 
     
     
       20. The method of  claim 19 , wherein said applying step is performed by hand or by a device. 
     
     
       21. The method of  claim 19 , wherein the method further includes the step of waiting for a period of time of from about 5 to about 45 minutes. 
     
     
       22. The soluble solid hair coloring article of  claim 1 , wherein said direct dye comprises in addition to said zwitterionic direct dye, an additional direct dye selected from the group consisting of: (i) non-ionic direct dye; cationic direct dye; anionic direct dye; a combination of non-ionic and cationic direct dye; and a combination of non-ionic and anionic direct dye.